A tsunami capable of destruction in a particular geographic region, generally within about 1,000 km of its source. Regional tsunamis also occasionally have very limited and localized effects outside the region. Most of the destructive tsunamis can be classified as local or regional, meaning their destructive effects are confined to coasts within a hundred km, or up to a thousand km, respectively, of the source -- usually an earthquake. It follows that many tsunami related casualties and considerable property damage also comes from such tsunami.